Lithographic press.



No. 721,420. PATENTED PEB. 241903. R. D. BUNGKB.,

LITHOGRABHIG PRESS.

APPLICATION FILED NOV. B, 1902. N0 MODEL. 3 SHEETS-SHEET 1. J,

.we mams Pneus co vNomufno., WASHINGTON. Dia

' No.721,420.\ PATBNTBD FEB.24,1903.

R. D. BUNGKE.

LITHOGRAPHIO PRESS.v

. APPLICATION FILED Nov. 1902.

NO MODEL. a SHEETS-SHEET z.

110.721,42-0. l A PATBNTBD BB. 214, 1903. RnB-UNCH. Y LITHOGRAPHIC PRESS.

APPLICATION FILED NOV. 6, 1902.

No MODEL. SHEETS-SHEET s.

wh-1eme s ,roz n WM @3313-7113 l'rozuclm M .UNITED STATES PATENT OEErcE.

RICHARD D. BUNCKE, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO THE FUCHS & LANG MANUFACTURING COMPANY, OF NEW7 YORK, N. Y., A

CORPORATION OF YORK.

LITHOGRAPHIQ PRESS.

SPECIFICATION 'forming part ef Letters Patent No. 721,42@ dated February '24, '1903.

Application tiled November 6,1902.k Serial No.'130,271.y (No model.)

To a/ZZ whom, it rra/ay col/werte: l Be it known that I, RICHARD D. BUNCKE, a citizen of the :United States, residing in Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Lithographie Presses, of which the following is a specification.

In lithographic presses used for printing tinlplate and other sheet metals the colors are o transmitted to the plates fed tothe impression-cylinder from the stone by means ofy a.

y2o with the required clearnessl and distinctness.

The object of this invention is to form an improved drying attachment for the blanket,

so that the colors are transmitted in a clear and eective manner from the stone to the z5 sheet-metal plate; and for this purpose the invention consists in the combination, with the lower blanket-carrying cylinder and upper pressure-cylinder, of a feed-table inclined at its forward end to feed the plates between 3o said cylinders, a Ventilating-fan located adjacent said blanket-carrying cylinder belowv the feed-table, means for rotating said fan,

means forpermitting the stopping of rotation of the fan, and a deiiecting-hood adapted to direct the current of air from the fan upon the blanket-carrying cylinder,as will be more fully described hereinafter and finally pointed out in thevclaims.

In the accompanying drawings, Figure l 4o represents a side elevation of a lithographic press for printing sheet-metal plates, with my improveddrying attachment. Fig. 2 is an end elevation of the press.V Fig. 3 isa transverse section on line 3 3, Fig. l; and Fig. Llis a Vertical transverse section,drawn on a larger scale, through the drying device on line 4 4, Fig. 3. f

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the one above and rotatably in `contact with the other. Adjacent :the contact portions of -the cylinders B and Gis arranged'an inclined por-4 tion of the feed-table Don the upper horizontal portion of=which theV plates to be decorated are fed. Theplates are fed over thel 6o inclined portion of thetable D, so as to be passed through the printing-cylinders.- The lower cylinder B is provided with the usual rubber blanket b, that 'takes theimpression from theA stonethat is adapted to be supported on the reciprocating bed of the machine and supplied with the icolor's from the inkrolls in the well-known manner. The blanketl transfers the impression from the inside of L thetin-plateiback to the same, the upper cyl- 7o inder taking up the tinfplate and moving it between the cylinders,;so asv to receive the impression. As the rubber blanket is moistened by thesucce'ssive' transfer of theimpressions, which is very objectionable, as the colorsare not clearlyjand. Idistinctly transferred to the .tin-plate, a drying attachment is arranged in proximity-to the blanket, so

as to dry the same afterreach impression is v made. This drying arrangement consists of 8o a Ventilating-fan F, to which rotary motion is imparted in the direction of the arrows shown in Fig. 4 by means of a'pulley-and-belt device P, connected with a lower shaft S through an intermediate shaft S and a shaft 8 5 S2A of the fan. The motion of the fan can be stopped when desired by means of a clutch device g and a clutch-shiftingleverG, which is arranged on the intermediate shaft S', so

that by shiftingthe lever sidewise the clutch 9o is disengaged, so that the motion of the fan is arrested whenthe same is not required.

The fan is preferably arranged in the frame y A of the press below the point where the horizontal and inclined portions of thefeed-table D meet each other. Back -of the rotating fan F is arranged a deiiecting plate or hood F', which is open at the front toward the under side of the inclined portion of the feed-table and cooperating therewith to direct the curroo rent of air from the fan in the direction of and along the under side, so as to throw the full force of the air-current onto the blanket of the lower cylinder B (shown by the arrows, Fig. l) as the same rotates in transferring the impression taken up from the stone. In this manner the surface of the blanket-cylinder is continually subjected to the drying effect of a current of air, whereby the meistening of the surface is prevented and the same kept in proper condition for clearly and effeetively transmitting the impression to the sheet-metal plates to be decorated. The rotation of the fan is kept up as long as the plates are printed, so that the blanket is dried during its rotation and during the period of taking it from the stone to the plates to be decorated.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination, with a lower blanketcarrying cylinder and upper pressure-cylinder of a lithographie press, of a feed-table inclined at the front end, a Ventilating-fan below the same at the upper end of the inclined portion, means for rotating thefan, and means fordetleeting the air forward toward and along the under side of the inclined portion of the feed-table, substantially as set forth.

2. The combination, with a lower blanketcarrying cylinder and upper pressure-cylinder of a lithographie press, of a feed-table inclined at its front portion, a Ventilating-fan supported under said table at the beginning of the inclined portion, means for rotating said fan, and a defiecting-hood at the rear of said fan and cooperating with the under side of the inclined portion of said table f or directing the air-current upon said lower cylinder, substantially as set forth.

3. In a lithographie press, the combination, with the lower blanket-carrying cylinder and upper pressure-cylinder, of a feed-table for feeding the sheet-metal plates between the cylinders, a Ventilating-fan located adjacent to the blanket-carrying cylinder below said feed-table, means for rotatiu g said fan, means for interrupting the motion ot' said fan when not required, and a deflecting-hood adapted to direct the current of air from the fan upon the blanketcarrying cylinder, substantially as set forth.

4. In a lithographie press, the combination, with the lower blanket-carrying cylinder and upper pressure-cylinder, of a feed-table for feeding the sheet-metal plates between the cylinders, a Ventilating-fan located adjacent to the blanket-carrying cylinder below said feed-table, means for rotating said fan, means for interrupting the motion of said fan when not required, and a delecting-hood in connection with the under side of said feed-table adapted to direct the current of air from the fan upon the blanket-carrying cylinder, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

RICHARD D. BUNCKE.

Witnesses:

PAUL GoEPEL, C. BRADWAY. 

